General Dynamics C4 Systems URC-200 (V2)
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configures and monitors the desired operating mode from either the front panel or via a
remote control unit attached to the remote connector. Two remote control units are
available: the UEC-120, which controls one transceiver/amplifier pair, and the UEC-220,
which can control up to two transceiver/amplifier pairs.
The URC-200 (V2) Transceiver provides up to 10 Watts average power at 80%
modulation (7.78 Watts CW power) RF output, but is normally set to low power in AM
or medium power in FM when connected to the UPA-55H Power Amplifier. Under
normal conditions, when the power amplifier detects RF at its input, it transitions to the
amplify/transmit mode and amplifies the input signal. The UPA-55H has two power
settings, “Low” and “High”. When switched to low power mode, the UPA-55H amplifies
the URC-200 (V2) input to 20 Watts FM and 20 Watts AM average (15.15 Watt CW)
output power and passes it to the antenna system. When switched to the high power
mode, the UPA-55H amplifies the URC-200 input to 50 Watt FM and 30 Watt AM
average (22.72 CW) output power. When no power is detected at the input, the amplifier
transitions to the bypass/receive mode and passes the received signals to the transceiver.
7.1.1.2 Signal Flow:
Audio is applied to the transceiver locally via the front panel audio input or remotely via
the remote connector depending on the external system connections. When keyed by
means of a PTT signal, the transceiver processes the audio and passes modulated RF
signal to the power amplifier via the antenna output. This triggers the power amplifier,
when on, to operate in the amplify mode. The power amplifier then amplifies the signal
to transmit at either high or low power, depending on the power switch setting, and
subsequently transmits the signal out the connected antenna.
Conversely, if the transceiver is not keyed to transmit, the power amplifier operates in the
bypass (receive) mode. Signals received by the antenna are passed straight through the
power amplifier to the transceiver through the antenna port. The transceiver then
demodulates the RF signal, converting it into voice data that is then sent out the audio
port to be listened to by the user.
NOTE
For additional equipment descriptions and operational information
on the equipment that makes up the Rack Mounted Base System,
refer to the individual equipment manuals.
7.1.2 Rack Mounted Base System Installation
For installation instructions for the rack mounted system, please refer to the URM and
UST Family of Mounting Trays Operation and Maintenance Manual, document number
99-P44032F.
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